TGTableLayout.cxx

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// @(#)root/gui:$Id$
// Author: Brett Viren   04/15/2001
 
/*************************************************************************
 * Copyright (C) 2001, Brett Viren                                       *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
/**************************************************************************
 
    This source is based on Xclass95, a Win95-looking GUI toolkit.
    Copyright (C) 1996, 1997 David Barth, Ricky Ralston, Hector Peraza.
 
    Xclass95 is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
 
**************************************************************************/
/**************************************************************************
 
    The Layout algorithm was largely translated from GTK's gtktable.c
    source.  That source is also distributed under LGPL.
 
**************************************************************************/
 
 
/** \class TGTableLayout
    \ingroup guiwidgets
 
A layout manager, which places child frames in a table arranged in
rows and columns, making it easy to align many widgets next each to
other horizontally and vertically. It uses TGTableLayoutHints
(not TGLayoutHints!!!) and works like TGMatrixLayout with the
addition that:
  - Child frames can span more than one column/row.
  - Child frames can resize with the frame.
  - Column and row sizes are not fixed nor (optionally) homogeneous.
  - The number of columns and rows must be fully specified in the constructor.
The gaps between all rows or columns can be specified by 'sep'
parameter in the constructor. All rows and columns will have the
same size (set by widest and the highest child frame) if the
parameter 'homogeneous' is set to kTRUE.
 
 
\class TGTableLayoutHints
\ingroup guiwidgets
 
This class describes layout hints used by the TGTableLayout class.
It specifies the column/row division number on which to attach the
child frame. This number starts from 0 and goes to #%_columns/#%_rows
respectively (0 indicates the first row/column).
 
Below are described all parameters of TGTableLayoutHints constructor
  - attach_left   - the column to the left of the widget;
  - attach_right  - the column to the right of the widget;
  - attach_top    - the row above the widget;
  - attach_bottom - the row below the widget;
  - hints - layout hints (combination of ELayoutHints)
 
The next parameters determine the extra padding added around the
child frame. By default these are 0.
  - padleft   - determines the extra padding added on the left
  - padright  - determines the extra padding added on the right
  - padtop    - determines the extra padding added on the top
  - padbottom - determines the extra padding added on the bottom
 
*/
 
 
#include "TGTableLayout.h"
#include "TGFrame.h"
#include "TList.h"
#include "Rtypes.h"
 
#include <iostream>
 
 
ClassImp(TGTableLayout);
ClassImp(TGTableLayoutHints);
 
////////////////////////////////////////////////////////////////////////////////
/// TGTableLayout constructor.
/// Note:
/// - Number of rows first, number of Columns second
/// - homogeneous == true means all table cells are the same size,
///   set by the widest and the highest child frame.
/// - s gives the amount of separation in pixels between cells
/// - h are the hints, see TGTableLayoutHints.
 
TGTableLayout::TGTableLayout(TGCompositeFrame *main, UInt_t nrows, UInt_t ncols,
                             Bool_t homogeneous, Int_t sep, Int_t hints)
{
   fMain    = main;
   fList    = fMain->GetList();
   fSep     = sep;
   fHints   = hints;
   fNrows   = nrows;
   fNcols   = ncols;
   fRow     = 0;
   fCol     = 0;
   fHomogeneous = homogeneous;
}
 
////////////////////////////////////////////////////////////////////////////////
/// TGTableLayout constructor.
 
TGTableLayout::~TGTableLayout()
{
   if (fRow) delete [] fRow;
   if (fCol) delete [] fCol;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Find the sizes of rows and columns needed to satisfy
/// children's layout policies.
 
void TGTableLayout::FindRowColSizes()
{
   // This is equiv. to GTK's requisition stage
 
   FindRowColSizesInit();
   FindRowColSizesSinglyAttached();
   FindRowColSizesHomogeneous();
   FindRowColSizesMultiplyAttached();
   FindRowColSizesHomogeneous();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Initialize values needed to determine the size of rows and columns.
 
void TGTableLayout::FindRowColSizesInit()
{
   if (fRow) delete [] fRow;
   if (fCol) delete [] fCol;
   fRow = new TableData_t[fNrows];
   fCol = new TableData_t[fNcols];
 
   // Find max of each row and column
 
   UInt_t i;
   for (i = 0; i < fNrows; ++i) fRow[i].fDefSize = 0;
   for (i = 0; i < fNcols; ++i) fCol[i].fDefSize = 0;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Determine the size of rows/cols needed for singly attached children.
 
void TGTableLayout::FindRowColSizesSinglyAttached()
{
   TIter next(fList);
   TGFrameElement *ptr;
 
   while ((ptr = (TGFrameElement *) next())) {
      if (ptr->fState == 0) continue;
      TGTableLayoutHints *layout =
            dynamic_cast<TGTableLayoutHints*>(ptr->fLayout);
      if (!layout) {
         Error("FindRowColSizesSinglyAttached", "didn't get TGTableLayoutHints from %s, layout = 0x%zx",
               ptr->fFrame->GetName(), (size_t)ptr->fLayout);
         return;
      }
      UInt_t col = layout->GetAttachLeft();
      if (col == (layout->GetAttachRight() - 1))
         fCol[col].fDefSize = TMath::Max(fCol[col].fDefSize,
                                         ptr->fFrame->GetDefaultWidth() +
                                         layout->GetPadLeft() +
                                         layout->GetPadRight());
 
      UInt_t row = layout->GetAttachTop();
      if (row == (layout->GetAttachBottom() - 1))
         fRow[row].fDefSize = TMath::Max(fRow[row].fDefSize,
                                         ptr->fFrame->GetDefaultHeight() +
                                         layout->GetPadTop() +
                                         layout->GetPadBottom());
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// If the table is homogeneous make sure all col/rows are same
/// size as biggest col/row.
 
void TGTableLayout::FindRowColSizesHomogeneous()
{
   if (!fHomogeneous) return;
 
   UInt_t max_width = 0, max_height = 0, col, row;
 
   // find max
   for (col = 0; col < fNcols; ++col)
      max_width = TMath::Max(max_width,fCol[col].fDefSize);
 
   for (row = 0; row < fNrows; ++row)
      max_height = TMath::Max(max_height,fRow[row].fDefSize);
 
   // set max
   for (col = 0; col < fNcols; ++col) fCol[col].fDefSize = max_width;
   for (row = 0; row < fNrows; ++row) fRow[row].fDefSize = max_height;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Checks any children which span multiple col/rows.
 
void TGTableLayout::FindRowColSizesMultiplyAttached()
{
   TIter next(fList);
   TGFrameElement *ptr;
 
   while ((ptr = (TGFrameElement *) next())) {
      if (ptr->fState == 0) continue;
      TGTableLayoutHints *layout =
            dynamic_cast<TGTableLayoutHints*>(ptr->fLayout);
      if (!layout) {
         Error("FindRowColSizesMultiplyAttached", "didn't get TGTableLayoutHints");
         return;
      }
      UInt_t left   = layout->GetAttachLeft();
      UInt_t right  = layout->GetAttachRight();
      if (left != right-1) {  // child spans multi-columns
         UInt_t width = 0, col;
         for (col = left; col < right; ++col) width += fCol[col].fDefSize;
 
         // If more space needed, divide space evenly among the columns
         UInt_t child_width = ptr->fFrame->GetDefaultWidth() +
                              layout->GetPadLeft() + layout->GetPadRight();
 
         if (width < child_width) {
            width = child_width - width;
            for (col = left; col < right; ++col) {
               UInt_t extra = width / (right - col);
               fCol[col].fDefSize += extra;
               width -= extra;
            }
         }
      }
      UInt_t top    = layout->GetAttachTop();
      UInt_t bottom = layout->GetAttachBottom();
      if (top != bottom-1) {  // child spans multi-rows
         UInt_t height = 0, row;
         for (row = top; row < bottom; ++row) height += fRow[row].fDefSize;
 
         // If more space needed, divide space evenly among the rows
         UInt_t child_height = ptr->fFrame->GetDefaultHeight() +
                               layout->GetPadTop() + layout->GetPadBottom();
 
         if (height < child_height) {
            height = child_height - height;
            for (row = top; row < bottom; ++row) {
               UInt_t extra = height / (bottom - row);
               fRow[row].fDefSize += extra;
               height -= extra;
            }
         }
      }
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// If main frame is bigger or smaller than all children,
/// expand/shrink to fill. This is symmetric under row<-->col
/// switching so it is abstracted out to a normal function to save typing.
 
void TGTableLayout::SetRowColResize(UInt_t real_size, UInt_t nthings,
                                    TableData_t *thing, Bool_t homogeneous)
{
   if (homogeneous) {
      UInt_t ind, nshrink=0, nexpand=0, cur_size=0;
 
      for (ind = 0; ind < nthings; ++ind)
         cur_size += thing[ind].fDefSize;
 
      if (cur_size < real_size) {
         for (ind = 0; ind < nthings; ++ind)
            if (thing[ind].fExpand) { ++ nexpand; break; }
         if (nexpand > 0) {
            UInt_t size = real_size;
            for (ind = 0; ind < nthings; ++ ind) {
               UInt_t extra = size / (nthings - ind);
               thing[ind].fRealSize = TMath::Max(1U, extra);
               size -= extra;
            }
         }
      }
      if (cur_size > real_size) {
         for (ind = 0; ind < nthings; ++ind)
            if (thing[ind].fShrink) { ++ nshrink; break; }
         if (nshrink > 0) {
            UInt_t size = real_size;
            for (ind = 0; ind < nthings; ++ ind) {
               UInt_t extra = size / (nthings - ind);
               thing[ind].fRealSize = TMath::Max(1U, extra);
               size -= extra;
            }
         }
      }
   } else {
      UInt_t ind, nshrink=0, nexpand=0, size=0;
      for (ind = 0; ind < nthings; ++ind) {
         size += thing[ind].fDefSize;
         if (thing[ind].fExpand) ++ nexpand;
         if (thing[ind].fShrink) ++ nshrink;
      }
 
      // Did main frame expand?
      if ((size < real_size) && (nexpand >= 1)) {
         size = real_size - size;
         for (ind = 0; ind < nthings; ++ind) {
            if (thing[ind].fExpand) {
               UInt_t extra = size / nexpand;
               thing[ind].fRealSize += extra;
               size -= extra;
               --nexpand;
            }
         }
      }
 
      // Did main frame shrink?
      if (size > real_size) {
         UInt_t total_nshrink = nshrink;
         UInt_t extra = size - real_size;
         while (total_nshrink > 0 && extra > 0) {
            nshrink = total_nshrink;
            for (ind = 0; ind < nthings; ++ind)
               if (thing[ind].fShrink) {
                  UInt_t size2 = thing[ind].fRealSize;
                  thing[ind].fRealSize = TMath::Max(1U,thing[ind].fRealSize - extra / nshrink);
                  extra -= size2 - thing[ind].fRealSize;
                  --nshrink;
                  if (thing[ind].fRealSize < 2) {
                     total_nshrink -= 1;
                     thing[ind].fShrink = kFALSE;
                  }
               }
         }
      }
   } // not homogeneous
}
 
////////////////////////////////////////////////////////////////////////////////
/// This gets the new sizes needed to fit the table to the parent
/// frame. To be called after FindRowColSizes.
 
void TGTableLayout::SetRowColSizes()
{
   SetRowColSizesInit();
   UInt_t border_width = fMain->GetBorderWidth();
 
   SetRowColResize(fMain->GetWidth() - (fNcols-1)*fSep - 2*border_width,
                   fNcols, fCol, fHomogeneous);
   SetRowColResize(fMain->GetHeight() - (fNrows-1)*fSep - 2*border_width,
                   fNrows, fRow, fHomogeneous);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Initialize rows/cols. By default they do not expand and they
/// do shrink. What the children want determine what the rows/cols do.
 
void TGTableLayout::SetRowColSizesInit()
{
   UInt_t col;
   for (col = 0; col < fNcols; ++col) {
      fCol[col].fRealSize = fCol[col].fDefSize;
      fCol[col].fNeedExpand = kFALSE;
      fCol[col].fNeedShrink = kTRUE;
      fCol[col].fExpand = kFALSE;
      fCol[col].fShrink = kTRUE;
      fCol[col].fEmpty = kTRUE;
   }
   UInt_t row;
   for (row = 0; row < fNrows; ++row) {
      fRow[row].fRealSize = fRow[row].fDefSize;
      fRow[row].fNeedExpand = kFALSE;
      fRow[row].fNeedShrink = kTRUE;
      fRow[row].fExpand = kFALSE;
      fRow[row].fShrink = kTRUE;
      fRow[row].fEmpty = kTRUE;
   }
 
   // Check single row/col children for expand/shrink-ability
   TIter next(fList);
   TGFrameElement *ptr;
   while ((ptr = (TGFrameElement*) next())) {
      TGTableLayoutHints *layout =
            dynamic_cast<TGTableLayoutHints*>(ptr->fLayout);
      if (!layout) {
         Error("SetRowColSizesInit", "didn't get TGTableLayoutHints");
         return;
      }
      ULong_t hints = layout->GetLayoutHints();
 
      // columns
      if (layout->GetAttachLeft() == layout->GetAttachRight()-1) {
         if (hints & kLHintsExpandX)
            fCol[layout->GetAttachLeft()].fExpand = kTRUE;
         if (!(hints & kLHintsShrinkX))
            fCol[layout->GetAttachLeft()].fShrink = kFALSE;
         fCol[layout->GetAttachLeft()].fEmpty = kFALSE;
      }
      // rows
      if (layout->GetAttachTop() == layout->GetAttachBottom()-1) {
         if (hints & kLHintsExpandY)
            fRow[layout->GetAttachTop()].fExpand = kTRUE;
         if (!(hints & kLHintsShrinkY))
            fRow[layout->GetAttachTop()].fShrink = kFALSE;
         fRow[layout->GetAttachTop()].fEmpty = kFALSE;
      }
   }
 
   // Do same for children of spanning multiple col/rows
   next.Reset();
   while ((ptr = (TGFrameElement*) next())) {
      TGTableLayoutHints *layout =
            dynamic_cast<TGTableLayoutHints*>(ptr->fLayout);
      if (!layout) {
         Error("SetRowColSizesInit", "didn't get TGTableLayoutHints");
         return;
      }
      ULong_t hints = layout->GetLayoutHints();
 
      // columns
      UInt_t left = layout->GetAttachLeft();
      UInt_t right = layout->GetAttachRight();
      if (left != right - 1) {
         for (col = left; col < right; ++col) fCol[col].fEmpty = kFALSE;
         Bool_t has_expand=kFALSE, has_shrink=kTRUE;
         if (hints & kLHintsExpandX) {
            for (col = left; col < right; ++col)
               if (fCol[col].fExpand) { has_expand = kTRUE; break; }
            if (!has_expand)
               for (col = left; col < right; ++col)
                  fCol[col].fNeedExpand = kTRUE;
         }
         if (!(hints & kLHintsShrinkX)) {
            for (col = left; col < right; ++col)
               if (!fCol[col].fShrink) { has_shrink = kFALSE; break;}
            if (has_shrink)
               for (col = left; col < right; ++col)
                  fCol[col].fNeedShrink = kFALSE;
         }
      }
 
      // rows
      UInt_t top = layout->GetAttachTop();
      UInt_t bottom = layout->GetAttachBottom();
      if (top != bottom - 1) {
         for (row = top; row < bottom; ++row) fRow[row].fEmpty = kFALSE;
         Bool_t has_expand=kFALSE, has_shrink=kTRUE;
         if (hints & kLHintsExpandY) {
            for (row = top; row < bottom; ++row)
               if (fRow[row].fExpand) { has_expand = kTRUE; break; }
            if (!has_expand)
               for (row = top; row < bottom; ++row)
                  fRow[row].fNeedExpand = kTRUE;
         }
         if (!(hints & kLHintsShrinkY)) {
            for (row = top; row < bottom; ++row)
               if (!fRow[row].fShrink) { has_shrink = kFALSE; break;}
            if (has_shrink)
               for (row = top; row < bottom; ++row)
                  fRow[row].fNeedShrink = kFALSE;
         }
      }
   }
 
   // Set expand/shrink flags
   for (col = 0; col < fNcols; ++col) {
      if (fCol[col].fEmpty) {
         fCol[col].fExpand = kFALSE;
         fCol[col].fShrink = kFALSE;
      } else {
         if (fCol[col].fNeedExpand) fCol[col].fExpand = kTRUE;
         if (!fCol[col].fNeedShrink) fCol[col].fShrink = kFALSE;
      }
   }
   for (row = 0; row < fNrows; ++row) {
      if (fRow[row].fEmpty) {
         fRow[row].fExpand = kFALSE;
         fRow[row].fShrink = kFALSE;
      } else {
         if (fRow[row].fNeedExpand) fRow[row].fExpand = kTRUE;
         if (!fRow[row].fNeedShrink) fRow[row].fShrink = kFALSE;
      }
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Sanity check various values.
 
void TGTableLayout::CheckSanity()
{
   TIter next(fList);
   TGFrameElement *ptr;
   UInt_t nerrors = 0;
   while ((ptr = (TGFrameElement*) next())) {
      TGTableLayoutHints *layout =
            dynamic_cast<TGTableLayoutHints*>(ptr->fLayout);
      if (!layout) {
         Error("CheckSanity", "didn't get TGTableLayoutHints");
         return;
      }
 
      UInt_t right  = layout->GetAttachRight();
      UInt_t left   = layout->GetAttachLeft();
      UInt_t top    = layout->GetAttachTop();
      UInt_t bottom = layout->GetAttachBottom();
 
      if (left == right) {
         ++nerrors;
         Error("CheckSanity", "AttachLeft == AttachRight");
      }
      if (left > right) {
         ++nerrors;
         Error("CheckSanity", "AttachLeft > AttachRight");
      }
      if (left > fNcols-1) {
         ++nerrors;
         Error("CheckSanity", "AttachLeft illegal value: %u", left);
      }
      if (right < 1 || right > fNcols) {
         ++nerrors;
         Error("CheckSanity", "AttachRight illegal value: %u", right);
      }
 
      if (top == bottom) {
         ++nerrors;
         Error("CheckSanity", "AttachTop == AttachBottom");
      }
      if (top > bottom) {
         ++nerrors;
         Error("CheckSanity", "AttachTop > AttachBottom");
      }
      if (top > fNrows-1) {
         ++nerrors;
         Error("CheckSanity", "AttachTop illegal value: %u", top);
      }
      if (bottom < 1 || bottom > fNrows) {
         ++nerrors;
         Error("CheckSanity", "AttachBottom illegal value: %u", bottom);
      }
 
   }
   if (nerrors) {
      Error("CheckSanity", "errors in %u x %u table", fNcols, fNrows);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Make a table layout of all frames in the list.
 
void TGTableLayout::Layout()
{
   CheckSanity();
 
   FindRowColSizes();
 
   SetRowColSizes();
 
   // Do the layout
   TIter next(fList);
   TGFrameElement *ptr;
   UInt_t border_width = fMain->GetBorderWidth();
   while ((ptr = (TGFrameElement*) next())) {
      TGTableLayoutHints *layout =
            dynamic_cast<TGTableLayoutHints*>(ptr->fLayout);
      if (!layout) {
         Error("TGTableLayout::Layout", "didn't get TGTableLayoutHints");
         return;
      }
      ULong_t hints = layout->GetLayoutHints();
      TGDimension size = ptr->fFrame->GetDefaultSize();
 
      UInt_t right  = layout->GetAttachRight();
      UInt_t left   = layout->GetAttachLeft();
      UInt_t top    = layout->GetAttachTop();
      UInt_t bottom = layout->GetAttachBottom();
 
      // Find location and size of cell in which to fit the child frame.
      UInt_t col, cell_x = border_width + left*fSep;
      for (col = 0; col < left; ++col) cell_x += fCol[col].fRealSize;
 
      UInt_t row, cell_y = border_width + top*fSep;
      for (row = 0; row < top; ++row) cell_y += fRow[row].fRealSize;
 
      UInt_t cell_width = (right-left-1)*fSep;
      for (col=left; col < right; ++col)
         cell_width += fCol[col].fRealSize;
 
      UInt_t cell_height = (bottom-top-1)*fSep;
      for (row=top; row < bottom; ++row)
         cell_height += fRow[row].fRealSize;
 
      UInt_t pad_left   = layout->GetPadLeft();
      UInt_t pad_right  = layout->GetPadRight();
      UInt_t pad_bottom = layout->GetPadBottom();
      UInt_t pad_top    = layout->GetPadTop();
 
      // find size of child frame
      UInt_t ww,hh;
      if (hints & kLHintsFillX)
         ww = cell_width  - pad_left - pad_right;
      else
         ww = size.fWidth;
      if (hints & kLHintsFillY)
         hh = cell_height - pad_top - pad_bottom;
      else
         hh = size.fHeight;
 
      // Find location of child frame
      UInt_t xx;
      if (hints & kLHintsFillX) // Fill beats right/center/left hints
         xx = cell_x + pad_left;
      else if (hints & kLHintsRight)
         xx = cell_x + cell_width - pad_right - ww;
      else if (hints & kLHintsCenterX)
         xx = cell_x + cell_width/2 - ww/2; // padding?
      else                    // defaults to kLHintsLeft
         xx = cell_x + pad_left;
 
      UInt_t yy;
      if (hints & kLHintsFillY) // Fill beats top/center/bottom hings
         yy = cell_y + pad_top;
      else if (hints & kLHintsBottom)
         yy = cell_y + cell_height - pad_bottom - hh;
      else if (hints & kLHintsCenterY)
         yy = cell_y + cell_height/2 - hh/2; // padding?
      else                    // defaults to kLHintsTop
         yy = cell_y + pad_top;
 
      ptr->fFrame->MoveResize(xx,yy,ww,hh);
      ptr->fFrame->Layout();
 
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Return default dimension of the table layout.
 
TGDimension TGTableLayout::GetDefaultSize() const
{
   TGDimension msize = fMain->GetSize();
   UInt_t options = fMain->GetOptions();
 
   if ((options & kFixedWidth) && (options & kFixedHeight))
      return msize;
 
   Int_t border_width = fMain->GetBorderWidth();
 
   TGDimension size(2*border_width + (fNcols-1)*fSep,
                    2*border_width + (fNrows-1)*fSep);
 
   UInt_t col, row;
   if (fCol)
      for (col = 0; col < fNcols; ++col) size.fWidth += fCol[col].fDefSize;
   if (fRow)
      for (row = 0; row < fNrows; ++row) size.fHeight += fRow[row].fDefSize;
 
   if (options & kFixedWidth)  size.fWidth = msize.fWidth;
   if (options & kFixedHeight) size.fHeight = msize.fHeight;
   return size;
}
 
// ________________________________________________________________________
void TGTableLayoutHints::SavePrimitive(std::ostream &out, Option_t * /*= ""*/)
{
 
   // Save table layout hints as a C++ statement(s) on output stream out.
 
   TString hints;
   UInt_t pad = GetPadLeft()+GetPadRight()+GetPadTop()+GetPadBottom();
 
   if (!GetLayoutHints()) return;
 
   if ((fLayoutHints == kLHintsNormal) && (pad == 0)) return;
 
   if (fLayoutHints & kLHintsLeft) {
      if (hints.Length() == 0) hints  = "kLHintsLeft";
      else                     hints += " | kLHintsLeft";
   }
   if (fLayoutHints & kLHintsCenterX) {
      if  (hints.Length() == 0) hints  = "kLHintsCenterX";
      else                     hints += " | kLHintsCenterX";
   }
   if (fLayoutHints & kLHintsRight) {
      if (hints.Length() == 0) hints  = "kLHintsRight";
      else                     hints += " | kLHintsRight";
   }
   if (fLayoutHints & kLHintsTop) {
      if (hints.Length() == 0) hints  = "kLHintsTop";
      else                     hints += " | kLHintsTop";
   }
   if (fLayoutHints & kLHintsCenterY) {
      if (hints.Length() == 0) hints  = "kLHintsCenterY";
      else                     hints += " | kLHintsCenterY";
   }
   if (fLayoutHints & kLHintsBottom) {
      if (hints.Length() == 0) hints  = "kLHintsBottom";
      else                     hints += " | kLHintsBottom";
   }
   if (fLayoutHints & kLHintsExpandX) {
      if (hints.Length() == 0) hints  = "kLHintsExpandX";
      else                     hints += " | kLHintsExpandX";
   }
   if (fLayoutHints & kLHintsExpandY) {
      if (hints.Length() == 0) hints  = "kLHintsExpandY";
      else                     hints += " | kLHintsExpandY";
   }
   if (fLayoutHints & kLHintsShrinkX) {
      if (hints.Length() == 0) hints  = "kLHintsShrinkX";
      else                     hints += " | kLHintsShrinkX";
   }
   if (fLayoutHints & kLHintsShrinkY) {
      if (hints.Length() == 0) hints  = "kLHintsShrinkY";
      else                     hints += " | kLHintsShrinkY";
   }
   if (fLayoutHints & kLHintsFillX) {
      if (hints.Length() == 0) hints  = "kLHintsFillX";
      else                     hints += " | kLHintsFillX";
   }
   if (fLayoutHints & kLHintsFillY) {
      if (hints.Length() == 0) hints  = "kLHintsFillY";
      else                     hints += " | kLHintsFillY";
   }
   out << ", new TGTableLayoutHints(" << GetAttachLeft() << "," << GetAttachRight()
       << "," << GetAttachTop()  << "," << GetAttachBottom()
       << "," << hints;
 
   if (pad) {
      out << "," << GetPadLeft() << "," << GetPadRight()
          << "," << GetPadTop()  << "," << GetPadBottom();
   }
   out << ")";
}
 
// __________________________________________________________________________
void TGTableLayout::SavePrimitive(std::ostream &out, Option_t * /*= ""*/)
{
 
   // Save table layout as a C++ statement(s) on output stream.
 
   out << " new TGTableLayout(" << fMain->GetName() << "," << fNrows << "," << fNcols;
 
   if (fSep) {
      if (fHomogeneous == kTRUE)
         out << ", kTRUE";
      else
         out << ", kFALSE";
   out << fSep;
   }
   out  << ")";
   // hints parameter is not used/saved currently
 
}